加

jiā
  1. to add
  2. (math.) plus
  3. to increase; to augment
  4. (used before a disyllabic verb, often after an adverb like 不 bù, 大 dà, 稍 shāo etc, to indicate that the action applies to sth previously mentioned, as in 稍加改良 shāojiāgǎiliáng "make some minor improvements to (it)")

CEDICT

math

Homographs

加 Jiā
  1. Canada (abbr. for 加拿大 Jiānádà)
  2. surname Jia